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A heat engine operating at maximum efficiency has an efficiency of 25 percent. The temperature of the cold reservoir is 300 K. Evaluate what is the hot reservoir?
An athlete executing a long jump leaves the ground at a 35.0? angle and travels 7.90m, If this speed were increased by just 5.0%, how much longer would the jump be
A square coil and a rectangular coil are each made from the same length of wire. Each contains a single turn. The long sides of the rectangle are twice as long as the short sides.
the basis of the sweep circuit used in an oscilloscope. Switch S is an electronic switch that closes whenever the potential across the switch increases to a value Vc, find the time constant for charging of the capacitor
A column of soldiers, marching at 134 paces per minute, keep in step with the music of a band at the head of the column. what is the approximate length of the column
A grating with 504 lines/mm is illuminated with light of wavelength 305 nm. What is an angular separation between the two lines formed in order m = 2.
A 610 kilogram elevator starts from rest and moves upward for 3.10 second with constant acceleration until it reaches its cruising speed, 1.66 m/s. Find the average power of the elevator motor during this period
A missile of mass 1.20 102 kg is fired from a plane of mass 4.85 103 kg initially moving at a speed of 3.35 102 m/s. what is the final velocity of the plane?
A 60-W incandescent bulb with a tungsten filament is connected to a 120-V power supply. the power dissipated by the cold bulb is
An irregularly shaped body of mass 1.50 kg is mounted on an axle located 21.0 cm from the center of gravity of the body. Find the body's moment of inertia about this axis
A glass tube that is bent into a rectangular "U". Find an expression for the difference in the height h between the tops of the liquid columns when (a) the tube has linear acceleration a in the direction of the x-axis, (b) when the tube has uniform a..
The magnetic flux that passes through one turn of a 10-turn coil of wire changes to 5.0 Wb from 6.0 Wb in a time of 0.086 s. The average induced current in the coil is 185A. What is the resistance of the wire
The radius of a wheel is 0.500 m. A rope is wound around the outer rim of the wheel. What is the torque on the wheel due to the rope
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